AO55E867 4KYFA-6747 RV Cummins/Onan QG4000 EVAP 4K WATT 120V SGL PHASE 60HZ FIXEDMOUNT GASOLINE EVAPORATIVE GENERATOR SE

Power your RV's appliances and air conditioning from a clean, integrated source with the Cummins Onan QG4000 EVAP Onboard RV Generator (Part #4KYFA-6747 / AO55E867). This 4,000-watt gasoline-powered, single-phase, fixed-mount generator is part of Onan's quiet gasoline (QG) lineup — delivering serious onboard power for running RV AC units and household-style loads, with the build quality and reliability Cummins/Onan is known for.

4,000W of Onboard Power

The QG4000 delivers 4,000W of AC running power at 120V, with up to 33.3 amps of maximum AC current. That's enough to comfortably run a rooftop AC unit alongside other RV loads, or to handle the kind of total electrical demand a mid-size RV needs when boondocking off-grid.

Quiet Gasoline (QG) Series — Engineered for Low Noise

The QG4000 operates at 60 dB at full load — quiet enough to run without overwhelming conversation at your campsite or making you the most unpopular RV at the boondocking spot. Onan's QG series is specifically engineered for low-noise onboard operation, a big quality-of-life upgrade over older noisy generators.

Onboard Fixed-Mount Design

Unlike portable generators, the QG4000 is a non-portable, onboard fixed-mount generator designed for permanent installation in your RV's generator compartment. That means:

Prefer LP / Propane?

If you'd rather run your generator off your existing RV propane supply, the Cummins Onan QG 3600 LP onboard generator is the same QG series platform with 3,600W output — running on liquid propane instead of gasoline (uses the same fuel supply as your furnace, water heater, and stove).

• Integrated electrical hookup — no extension cords running through your rig
• Always on board — no loading/unloading from external storage
• Cleaner appearance — no portable generator parked outside your rig
• One-button starting from inside the RV

Smart Features for Reliable Operation

The QG4000 includes several features that make it more dependable and easier to live with:

• Microprocessor control with digital voltage regulation for clean, stable AC output
• Automatic choke — no manual fiddling for cold starts
• Electric start — push-button starting from your RV's control panel
• Automatic low oil shutdown — protects the engine from damage
• Additional shutdown protections to safeguard the unit and your RV's electrical system

Built for Long-Term Use

A single-cylinder, 4-stroke, OHV (overhead valve), air-cooled gasoline engine delivers durable, proven performance — the kind of design RV owners can maintain and rely on for years. The QG4000 is EPA certified (please note: not CARB certified, so it may not be sold or shipped to California or other CARB-restricted states).

Key Features

• 4,000W AC running power at 120V, single phase, 60 Hz
• 33.3 amps maximum AC current
• Onboard fixed-mount generator (not portable)
• Quiet 60 dB operation at full load
• Microprocessor control with digital voltage regulation
• Electric start with automatic choke
• Automatic low oil shutdown and additional shutdown protections
• Single-cylinder OHV 4-stroke gasoline engine, air-cooled
• EPA certified (not CARB certified)
• FREE freight shipping to the 48 states (freight items cannot be returned)
• Backed by a limited 3-year warranty

Specifications

• Brand: Cummins / Onan
• Model: QG4000 EVAP (4.0 KYFA-6747)
• Part Number: AO55E867 / 4KYFA-6747
• Series: Quiet Gasoline (QG) — RV QG 4000
• Type: Onboard fixed-mount RV generator
• Fuel Type: Gasoline (evaporative)
• AC Running Watts: 4,000W
• Rated Voltage: 120V
• Max AC Current: 33.3 amps
• Phase: Single phase
• Rated Frequency: 60 Hz
• Engine: Single cylinder, 4-stroke, OHV, air-cooled
• Starting System: Electric
• Choke Type: Automatic
• Inverter Equipped: No
• Automatic Low Oil Shutdown: Yes
• Noise Level (Full Load): 60 dB
• EPA Certified: Yes
• CARB Certified: No
• Wheels: None (non-portable)
• Dry Weight: 172 lbs
• Dimensions: 30" L x 19-3/4" W x 14-1/2" H
• Warranty: Limited 3-year